How Do I Put an Invention Into the Public Domain?
Nefarious Wheel writes "I have a couple of inventions — mechanical devices, based on physical principles — that I believe could transform certain aspects of industry. The trouble is, I can't afford to file patents, and even if I could, I'm not sure that would be the best way for these devices to be made available as widely as I'd like. Is there some way to publish the details of these innovations in the public domain in such a way as to protect them from being snaffled away by some patent troll? I'd be happy with a contribution (or simple attribution) model for recompense, which could be zero to whatever, but that's not as important to me as getting the ideas out there for anyone who wants to use them. This isn't copyright, and I know of no patent equivalent to Creative Commons. In short, what's the best way to protect an invention against someone filing a patent on it, short of patenting the device yourself? Can this be done?"
Once something is published, it becomes "prior art" and someone else can't patent prior art and obvious extensions to prior art.
And also once you publish it, you can't file for a patent on it outside the US, and you can only file for a US patent within a year.
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You can put an invention into the public domain by simply publishing it and then failing to file a patent on it. The main thing here is to find a low cost forum that will preserve your publication for a long time.
But patent examiners aren't likely to find such published prior art unless you publish it in something that patent examiners actually read. Google defensive publication brought me a Wikipedia article explaining the concept and a short guide.
File a statutory invention registration with the patent office.
http://en.wikipedia.org/wiki/United_States_Statutory_Invention_Registration
Alternately, you can file a provisional patent application, and then just abandon it by not filing anything else for a year.
Either of these will become part of the patent office's database and thus will be searched by patent examiners.
I've used Research Disclosure publications which I'm pretty sure U.S. patent applicants are required to look through in their search for prior art.
Filing a Statutory Invention registration costs $920, with no discount for small entity. It's much cheaper to file an application and abandon it. Filing costs $330 or $165 for small entity (you are almost certainly a small entity). The filing fee can be higher if your application has a rather large number of claims or a complicated claim dependency structure. Here is the current fee schedule at the US PTO: http://www.uspto.gov/web/offices/ac/qs/ope/fee2009january01_2009jan12.htm
Either way, you must conform to the required format for the filing. Special attention must be given to drawings, so that labels and textual descriptions in drawings match the associated descriptions in the text specification (and all drawings must have descriptions). Drawings may NOT be in colour, or employ shading to distinguish areas - only cross-hatching or other fill patterns are allowed. The application must be accompanied by copies of any references or prior art cited. This is to ensure that your disclosure will be interpreted in the correct way later, even if you abandon it. Before it is printed, there may be requests for formal changes.
I recommend you become familiar with the Manual of Patent Examining Procedure: http://www.uspto.gov/web/offices/pac/mpep/index.htm
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